Machine for molding carbon points



(No Model.) 3 Sheets- Sheet 1 T. B. DOOLEY. MACHINE .FOR MOLDING CARBON POINTS. No. 452,599. Y Patented MaylQ, 1891.

flin-mgm' m` a g (No Model.) 3 Sheets-Sheet 2.

A T. B. DOOLEY.

MACHINE PoR MOLDING CARBON`POINTS. .Y No. 452,599'. Patented May 19, 1891.

No-model., 3 sheets-sheen T. B. DOOLEY.

MACHINE FOR MOLDING CARBON POINTS.

No.452,599. y PatQntedMaylQ, 1891.

I I o I l l Q j f,

f UNITED' STATES 'PATENT OFFICE.

THOMAS B. DOOLEY, OF -MALDEN, MASACIHSETTS.

lMACH-HNEFon Mol- DING CARBON POINTS.

SPECIFICATION ferming'part of vLetters Patent No. 452,599, dated May 19, 1891. Application tiled September 15., 1890. Serial No.364,9'85. (No model.)

.To all whom .it may concern:

cally molded from powdered carbon agglom erated with dextrine or other lsimilar matter toform a thick paste or plastic mass and to perform the work in a highly efficient manner.

The invention consists ofthe machine and parts and combination .of parts in a machine for molding of carbon points or pencils, as is hereinafter fully described, and pointed out in the claims appended to this specification. Reference is to be had to the annexed drawings and to the letters of reference marked thereon, forming a part of-tlns specification,

the saine letters designating the same parts or features, as the case ma)T be, ywherever they occur.

In the said drawings, Figure l isa side ele.- vation of my improved machine complete, parts being represented as broken out. Fig. l is a topplan view of the same. Fig. I3 is a longitudinal sectional view ofthe same.

a l l In the drawings, a designates the frame of the machine, which may be made of iron .or of any other suitable material capable of supporting the parts comprising the invention.

b designates a cylindrical 'tank adapted to receive the plastic carbon to be molded into points or other articlesmr things through the port or opening c, which may be closed by The tank l) is conprovided with so that the means of a screw-plug d. nected withl a base or bed e, lugs f, which rest upon rods g,

` bed and tank may be adj usted longitudinally of the machine upon the said rods g fora purpose to be presently explained.

As a convenient means for adjusting the bed and tank as just described, I have represented two rods 71, supported in suitable bearings in the'bed, s o as to be turned therein, but not so that they may be moved longitudinally, the forward ends of the rods being serewthreaded,'as represented at fi, Where they are tapped through the rearward lugs f of the bed e. Each rod h is provided with a gear-wheelj, the teeth of the gears meshing with each other, as is best shown in Fig. 2. Upon one of the rods is aii'xed hand-wheel 7.1, so that by turning the said hand-wheel and its rod the gear-'wheel thereon, engaging with the light gear-wheel on the opposite rod, will operate the latter in unison with the former and so adjust or move the bed and tank as may be desired.

l designates a steam or hydraulic cylinder,

through ports 'm o r mi', according to the position of the cut-off n.. The forward end of the piston-rod o is provided vwith a piston 15,' which fits closely in the tank b, and is adapted to operate upon the material which may be placed therein and force Ithe same forward through the port q, formed at. a central point in the conical forward end r of the -tank. The tank is provided with a stop-cock s at a point where the port q is formed therein,y so that said port may be .opened or closed, as circumstances may require.

t designates a mold-support, in the present instance shown as of circular forni and provided with a shaft 1l., which is journaled atits ends in. beds or supports connected with the forward end of the tank b, and with a bracket- .or upright l. at the opposite side, connected -to which water or steam may be admitted with the frame .c2/. r` The moldfsupporttis provided at suitable intervals on its periphery with beds u, forming sections of molds suitable for molding or shaping carbon points or pencils or other articles which it may be desired to construct. 'lhe outer portion a: of the molds is madeI removable, so that after a point has been formed or molded therein the removable section may be taken away and 'the molded article removed from the matrix.

The forward bed or side support l/ for the mold-support is provided with horizontally., arranged rods or pins 2f, which'exteud int-o holes a', formed in the forward side of the upright r, so that said bed 4gj may be moved towardand fromthe mold-support u. A rod b through the bracket, and are provided on. A their upper ends with gears fr', havingr sereni i.;

extends through the upright 1f and is provided at its inner end with a head c', which bears against the bed y opposite the end ot" the mold brought into position to be filled from the tank l). Astrong spring d is interposed between the forward side of the upright 'n and the head c', so as to operate with a tendency of pressing the Vhead c against the bed y and firmly clamping the ends of the mold brought into position to be filled. between the beds y and y. A hand-wheel e has a serew-threaded connection with the rod 'Il' outside of the upright lr, so that by turning the said hand-wheel the rod Z2 and head c' may be drawn away from the bed y, permitting the mold-support w to be rotated on its journal-shaft w and the molds to be freely moved between the beds y y.

f designates a bracket connected with the upright r and extending over the mold-support to a point above that which will be occupied by a mold which may be broughtinto posit-ion to be supplied with material from the tank.

g is a bed or clamp supported in the bracket f by means or' rods h', which extend threaded connection with the said rods, and which engage a pinion j', connect-ed with a shaft 7a', extending through the bracketf at a point between the rods h. The upper end of the shaft k is provided with a bevel-gear l', which is engaged by a bevel-pinion nz. on the end of the shaft fn', with which is connected a hand-wheel o', so that by turningr the hand-wheel the bed g may be raised or lowered, as it may be desired, through the medium et the pinions and gear-wheels and their adjuncts just described.

The beds il; for supporting the molds are made adjustable to and from the periphery of the mold-support by means of rods p', screw-threaded at bot-h endsand tapped at one end inthe hub of the mold-support and at the other end in the bed w, se that by turning the rods p the mold-supports may be adjusted, as just described.

q designates an airport formed in the bed z/ at a point opposite the port ([,formed in the tank ZJ, a suitable cock r being provided to open and close said air-port q', as eircumstances may require,in the operation of n1olding the points.

The operation of my machine may be de` scribed as follows: Material of suitable charn acter being supplied to the tank b and a mold being brought into proper posit/ierL opposite the forward end ot the tank and so that the port 'q will communicate with the matrix of the mold, thc part ,r of the mold will be clamped upon the other part er parts by means of the bed y', the hand-wheel o, and intermediaries, as described. The steam or water will then be admitted to the cylinder l or other suitable motor set in operation to aetuate the piston fp to press the material in the tank l1 through the port g into the matrixr of the mold with the necessary pressure, the air in the material and in the mold finding an exitv through the port q. Before pressure upon the'material in the matrix of the mold ceases the cock r may be' closed. After the pencil has been molded the stop-cock s may, if need be, be momentarily closed, the clampbed be raised from the mold, the pressure of spring d released, and the mold-supporttrotated so as to bring another mold into position to be acted upon, as has just been described with relerence to the mold moved out of register with the port q. In this way carbon points or pencils maybe rapidly molded or formed, onefoperator attending to the removal oi' the molded points, while another may be engaged in making or molding the same.

It is obvious that various changes may be made in the form and arrangement of parts comprising. my invention without departing fromv the nature or spirit thereof, it being manifest that other means than those herein shown may be employed for clamping the parts of the molds together and for adjusting and supporting the 1no1d-support, and, further, that instead of makin g the mold-support of arotary nature it might be made to slide horizontally and be provided with a plurality of molds, which might be moved into position opposite the port q of the tank b and away therefrom, and that any suitable motor may be employed for operating the piston p.

Having thus explained the nature of my invention and described a way of constructing and using the same, I declare that what claim is l. A machine for molding carbon points or pencils, consisting of a tank provided with an outlet-port and adapted to contain plastic material to be operated upon, a piston to force the material from thc tank through the said port, a motor or engine to move the piston, and a movable mold-support adapted to support a plurality ot separable molds and move the same into position to be filled through the port of the tank, the adjustable supportingbed for one part of each of said molds, and an adjustable clamping-bed for clamping said molds together, as set forth.

2. A machine for molding carbon points or pencils, consisting of a tank provided with an outlet-port and adapted to contain the maten rial to be operated upon, a piston to force the material from the tank through the said port, a motor or engine to move the pisto11,a movable mold-support adapted to support a plurality of separable molds and move the same into position to be lilled through the said port of the tank, and a clamp for clamping the parts of the molds together at the point of iilling, as set forth.

3. A rotary mold-holding frame or support provided with a plurality of removable molds, a support for the ends of the molds, a port in .one of said supports to admit materialto the IOO IIC

molds to be molded, n air-exit port in the Inv testimony whereof I have signed my other support, and stop-cocks in said ports, name to this specification, in the presence. of as set forth. two subscribing witnesses, this 13th day of 4. A rotary mold-holding frame-orsupport September, A. D. 1890. provided with adjustable beds w, adapted to .support molds thereon, a clamping-bed g for THOMAS B. DOOL'EY.

clamping the parts of the mold together, a Witnesses: tank b, provided with a, port q,andamovable ARTHUR W. CRossLEY,l piston p, as set forth. v l A. D. HARRISON. 

